| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have been [art] [noun sg] | 1453 |
|
| 2 | could have been [art] [noun] | 218 |
|
| 3 | could [verb] been [art] [noun sg] | 208 |
|
| 4 | could have be [art] [noun sg] | 208 |
|
| 5 | could have [been] [art] [noun sg] | 208 |
|
| 6 | could have [be] [art] [noun sg] | 208 |
|
